package com.tanhua.dubbo.server.service;

import cn.hutool.core.util.StrUtil;
import cn.hutool.http.HttpRequest;
import cn.hutool.http.HttpResponse;
import cn.hutool.json.JSONObject;
import cn.hutool.json.JSONUtil;
import com.alibaba.dubbo.config.annotation.Service;
import com.tanhua.dubbo.server.config.HuanXinConfig;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;

import java.util.HashMap;
import java.util.concurrent.TimeUnit;

@Service
@Slf4j
public class TokenService {
    @Autowired
    private RedisTemplate<String, String> redisTemplate;
    private static final String REDIS_KEY = "HX_TOKEN";
    @Autowired
    private HuanXinConfig huanXinConfig;

    /**
     * 获取token 先从redis中获取
     *
     * @return
     */
    public String getToken() {
        String token = this.redisTemplate.opsForValue().get(REDIS_KEY);
        if (StrUtil.isNotEmpty(token)) {
            return token;
        }
//没有获取到token 访问环信接口去获得一个新的token
        return this.refreshToken();
    }


    //环信接口获取token 并且把token保存在redis中
    String refreshToken() {
        String targetUrl = this.huanXinConfig.getUrl() + this.huanXinConfig.getOrgName() + "/" + this.huanXinConfig.getAppName() + "token";
        HashMap<String, Object> param = new HashMap<>();
        param.put("grant_type", "client_credentials");
        param.put("client_id", this.huanXinConfig.getClientId());
        param.put("client_secret", this.huanXinConfig.getClientSecret());

        HttpResponse response = HttpRequest.post(targetUrl).body(JSONUtil.toJsonStr(param)).timeout(20000).execute();
        if (!response.isOk()) {
            log.error("token刷新失败~~~~!");
            return null;
        }
        String jsonBody = response.body();
        JSONObject jsonObject = JSONUtil.parseObj(jsonBody);
        String token = jsonObject.getStr("access_token");
        if (StrUtil.isNotEmpty(token)) {
            //将token数据缓存到redis中，缓存时间由expires_in决定
            //提前1小时失效
            Long timeOut = jsonObject.getLong("expires_in") - 3600;
            this.redisTemplate.opsForValue().set(REDIS_KEY, token, timeOut, TimeUnit.SECONDS);
        }
        return null;
    }


}
